Spbing-balance fob



UNITED STATES PATENT FFICE.

F'. H. SMITH, OF PLAINVILLE, CONNECTICUT.

SPRING-BALANCE FOR WINDOW-SASI-I.

Specification of Letters Patent No. 24,154, dated May 24, 1859.

To all whom t may concern:

Be it known that I, F. H. SMITH, of Plainville, county of Hartford, and State of Connecticut, have invented a certain new and useful Improvement in Sash Spring-Balances; and I do hereby declare that the same is described and represented in the following specification and drawings; and to enable others skilled in the art to make and use the same I will proceed to describe the construction and operation, referring to the drawings, in which the same letters indicate like parts in each of the figures.

The nature of this improvement consists in arranging the device (made in double form) in the head jamb of the window, directly over the side edge of the sash, which is lifted by cords passing over the edge of a plain spring pulley, or over a conical or spiral groove spring pulley revolving on a spindle secured from turning by pawl and ratchet, and the other end secured to the edge of the sash and is susceptible of being wound up, one through the other, so that the tension of the springs may be increased or diminished at will.

In the accompanying drawings is shown a section of a window frame embracing a portion of the side jamb, and a portion of the head j amb of the window.

A is the side jamb.

B, is the outside face casing.

C, is the inside face casing.

D, is the sash stop.

E, is the parting strip.

Gr is the double sheave pulley or frame work.

F, are the spring pulleys. l

J, are the spindles on which the pulleys turn, the end of which are supported in the sides of the sheave.

I are ratchets secured on the inner ends of the spindles J.

The ends of the face casing of the pulley K, is let into the side jamb of the window thus firmly securing the end which receives the greatest draft from the weight of the window. The other end is secured in the usual way by screws.

H, are pawls secured to the center plate.

The ratchets and pawls are employed to hold the spindles J, from turning, except in the direction for tightening up the sprlngs.

R and S are key-stems, S, being larger than the other, and is inserted into the socket N, through the outer pulley F nearest to the face casing R, is inserted into the socket O, of the inner pulley F through the pulley F thus allowing the pulley F to be wound up or relaxed by inserting the key through the socket of the pulley F, or to wind up both through the same orifice P, by turning the key lightly and lifting the pawls, and letting the key turn backward till sufliciently let down. Said pawls are made with handles or arms hanging downward for the convenience of liberating them when desired.

M, is a roll to keep the cord L, nearly in a perpendicular line with the edge of the sash when the conical pulley F, is used, but it is not required in the use of the straight surface-pulley F.

I believe I have thus described my improvement so as to enable others to make and use the same.

Now by introducing the pulley into the head jamb of the window, which I believe to be a decided improvement over the ordinary way of inserting them int-o the side jamb, I get straight draft or nearly so, in a l labor and is more readily performed and is more easily removed when desired. Thus.

when viewed in its construction and arrangement, the manner of applying them to the window and its general advantages as shown and described, it is thought cannot fail to show its advantage over others now in use.

What I claim therefore and desire to secure by Letters Patent is- 1. The manner of securing the pulleys in the head jamb of the window frame as described.

2. The manner of winding up and adjusting the two pulleys through one orifice for the purpose described.

F. H. SMITH.

`Witnesses:

NoRRrs CLARKE, JosrAH C. URBER. 

